I also look forward to the day Editorial files can be stored in iCloud Drive! It will make workflows so much smoother! iCloud Drive is standard by now and most other editors support it. I love Editorial for its superior design and flexibility, but not having iCloud Drive really is a pain for anyone having a reason not to use Dropbox.

+1 for iCloud and iOS Files app integration - open from in particular, I would appreciate the option (as now works with Byword, for example) to open a .md file from the iOS files app in Editorial (a file stored in the iCloud Drive) edit it, and have it remain in the iOS Files/iCloud space.